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C32000 Brass vs. 8021 Aluminum

C32000 brass belongs to the copper alloys classification, while 8021 aluminum belongs to the aluminum alloys. There are 28 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is C32000 brass and the bottom bar is 8021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
70
Elongation at Break, % 6.8 to 29
2.3
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 41
26
Tensile Strength: Ultimate (UTS), MPa 270 to 470
160
Tensile Strength: Yield (Proof), MPa 78 to 390
130

Thermal Properties

Latent Heat of Fusion, J/g 190
400
Maximum Temperature: Mechanical, °C 170
170
Melting Completion (Liquidus), °C 1020
650
Melting Onset (Solidus), °C 990
640
Specific Heat Capacity, J/kg-K 380
900
Thermal Conductivity, W/m-K 160
220
Thermal Expansion, µm/m-K 19
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
56
Electrical Conductivity: Equal Weight (Specific), % IACS 37
180

Otherwise Unclassified Properties

Base Metal Price, % relative 28
9.0
Density, g/cm3 8.7
2.8
Embodied Carbon, kg CO2/kg material 2.6
8.1
Embodied Energy, MJ/kg 42
150
Embodied Water, L/kg 310
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 30 to 59
3.4
Resilience: Unit (Modulus of Resilience), kJ/m3 28 to 680
130
Stiffness to Weight: Axial, points 7.1
14
Stiffness to Weight: Bending, points 18
49
Strength to Weight: Axial, points 8.8 to 15
16
Strength to Weight: Bending, points 11 to 16
23
Thermal Diffusivity, mm2/s 47
88
Thermal Shock Resistance, points 9.5 to 16
7.0

Alloy Composition

Aluminum (Al), % 0
98 to 98.8
Copper (Cu), % 83.5 to 86.5
0 to 0.050
Iron (Fe), % 0 to 0.1
1.2 to 1.7
Lead (Pb), % 1.5 to 2.2
0
Nickel (Ni), % 0 to 0.25
0
Silicon (Si), % 0
0 to 0.15
Zinc (Zn), % 10.6 to 15
0
Residuals, % 0
0 to 0.15